Liquid packaging machine head and liquid packaging machine

Abstract

The utility model discloses a liquid packaging machine head which comprises an electric control box, a material storage tank, a liquid separation assembly, a metering pump set and a filling valve set, the electric control box is integrated on the same rack, the material storage tank, the liquid separation assembly, the metering pump set and the filling valve set are sequentially communicated through pipelines, and the electric control box at least controls and is connected with the metering pump set. Liquid in the material storage tank is divided into a plurality of output branches through the liquid separation assembly, and the output branches correspondingly enter the metering pumps of the metering pump set respectively; components for executing subpackaging and filling are integrated on the machine head, the machine head is an independent module, the machine head and the machine body are two relatively independent modules, the machine head is installed on the machine body through a machine frame of the machine head, and independent transportation, installation and maintenance are facilitated; the filling valve is driven by the lifting mechanism to ascend and descend so as to control the distance between the nozzle of the filling valve and the liquid level in the filled container, so that the nozzle of the filling valve moves upwards along with the ascending of the liquid level in the filled container, and the phenomena of splashing and wall hanging are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging equipment, in particular to a liquid packaging machine head and a liquid packaging machine. Background Art

[0002] Liquid packaging machine head is a packaging machine used for filling multi-row back-seal packaging products, widely used in food, medical, cosmetic products and other industries.

[0003] The existing liquid packaging machine body and head are an integral structure, the structure size is too large, the transportation is inconvenient, and the installation and maintenance of the equipment are difficult. Utility Model Content

[0004] The purpose of the utility model is to provide a liquid packaging machine head and a liquid packaging machine, wherein the head is designed as a module and can be installed and disassembled as a whole relative to the machine body, so as to solve the technical problem of inconvenient transportation, installation and maintenance of the packaging machine as a whole in the prior art.

[0005] In order to solve the above technical problems, the utility model specifically provides the following technical solutions: a liquid packaging machine head, comprising an electric control box integrated on the same frame and a material storage tank, a liquid separation component, a metering pump group and a filling valve group connected in sequence through pipelines, wherein the electric control box at least controls the connection of the metering pump group;

[0006] The liquid in the storage tank is divided into a plurality of output branches by the liquid separation component, and respectively corresponds to each metering pump entering the metering pump group. The output end of each metering pump is connected to a filling valve of the filling valve group for filling.

[0007] Furthermore, the metering pump group is openly arranged at the top of the frame, the storage tank is arranged on one side of the frame, the filling valve group is arranged on the other side of the frame, and the electric control box is arranged on the frame on one side of the storage tank.

[0008] Furthermore, each of the filling valves is connected to a follower mechanism, and the follower mechanism can drive each of the filling valves to perform reciprocating motion synchronously or independently to keep the liquid outlet end of the filling valve always close to the liquid surface in the packaging container.

[0009] Furthermore, the follower mechanism includes a ball screw pair, a driving device and a connecting piece; the ball screw pair is vertically arranged on the mounting position corresponding to the frame; the driving device is used to drive the screw of the ball screw pair to rotate; the connecting piece is used to connect the ball nut of the ball screw pair and the filling valve, so that the filling valve and the ball nut move synchronously.

[0010] Furthermore, all the filling valves of the filling valve group are arranged at the same height on the same mounting plate; the lifting mechanism is set as 1 group; the connecting piece is used to connect the ball nut of the ball screw pair and the mounting plate, so that the filling valve group and the ball nut move synchronously.

[0011] Furthermore, two sets of sensors are provided on the frame along the length direction of the screw rod; the sensors are used to send an electrical signal to the electric control box when the ball nut or the connector moves to the sensing area of ​​the sensor, and the electric control box stops driving the screw rod of the ball screw pair to continue rotating according to the received electrical signal;

[0012] This is to limit the highest position and the lowest position of the filling valve group during its vertical movement.

[0013] Furthermore, the driving device includes a driving motor, and the driving motor drives the screw to rotate through a belt transmission; the electric control box controls the start and stop, and forward and reverse rotation of the driving motor.

[0014] Furthermore, the liquid separation component includes a liquid separation main pipe and multiple liquid separation branch pipes, one end of each of the liquid separation branch pipes is connected to the liquid separation main pipe; the other end of each of the liquid separation branch pipes is connected to the metering pump; one end of the liquid separation main pipe is sealed, and the other end is connected to the storage tank.

[0015] Furthermore, the storage tank includes a tank body, which is provided with a liquid inlet and a liquid outlet; the liquid inlet is connected to an external material storage device through a pipeline, and a solenoid valve is provided on the pipeline, and the liquid outlet is connected to the liquid distribution main pipe; a liquid level gauge is provided inside the tank body; the liquid level gauge is used to obtain the real-time liquid level height of the material in the tank body and send an electrical signal to the electrical control box, and the electrical control box controls the opening or closing of the solenoid valve according to the received electrical signal.

[0016] Furthermore, the tank body is a relatively sealed cavity; a respirator is provided on the tank body so that the inside and outside of the tank body are connected.

[0017] Furthermore, a cleaning port is provided on the side wall of the tank body.

[0018] In order to solve the above technical problems, the utility model also specifically provides the following technical solutions:

[0019] A liquid packaging machine comprises the above-mentioned machine head and machine body, wherein the machine head is detachably mounted on the machine body, and an electric control box of the machine head and a main control system of the machine body are connected via a main line.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The liquid packaging machine head provided in the present application integrates various components for performing subpackaging and filling on the head, so that the head and the body are two relatively independent modules, and the two are detachable structures, which are convenient for separate transportation, installation and maintenance.

[0022] Furthermore, the machine head has modular design for each component, which is convenient for disassembly and assembly, and each component can be maintained individually.

[0023] Furthermore, during the filling process, the nozzle of the filling valve rises as the liquid level of the material in the container changes, so that the nozzle of the filling valve and the liquid level of the material are always maintained in an appropriate range, so that the material ejected from the nozzle of the filling valve directly enters the material below, avoiding contact with the inner wall of the container, avoiding splashing and wall sticking.

[0024] The present application also provides a liquid packaging machine, in which the head and the body are two relatively independent modules, and the components for performing subpackaging and filling are integrated on the head, which is convenient for separate transportation, installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0026] Figure 1 This is a result schematic diagram of the packaging machine head in this embodiment;

[0027] Figure 2 for Figure 1 A side view of the packaging machine head shown;

[0028] Figure 3 It is a structural schematic diagram of the follower mechanism in this embodiment;

[0029] Figure 4 Schematic diagram of the structure of the liquid separation component in this embodiment;

[0030] Figure 5 This is a schematic diagram of the structure of the storage tank in this embodiment;

[0031] Figure 6 It is a structural diagram of the filling valve.

[0032] The numbers in the figure represent the following:

[0033] 1-storage tank, 11-tank body, 12-liquid inlet, 13-liquid outlet, 14-solenoid valve, 15-liquid level gauge, 16-respirator, 17-cleaning port;

[0034] 2-liquid dispensing assembly, 21-liquid dispensing main pipe, 22-liquid dispensing branch pipe;

[0035] 3-metering pump set, 31-metering pump, 32-hose;

[0036] 4-filling valve group, 41-filling valve, 42-connector, 43-valve body, 44-nozzle;

[0037] 5-follow-up mechanism, 51-ball screw pair, 52-driving device, 53-connecting piece, 54-mounting plate, 55-sensor, 56-through slot, 57-slide rail, 58-slider, 521-driving motor, 522-synchronizing wheel, 523-synchronizing belt; 531-connecting plate, 532-connecting rod;

[0038] 6-Electric control box;

[0039] 7-frame, 71-support plate, 72-top mounting plate, 73-bottom support plate, 74-side plate. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] like Figure 1 and Figure 2 As shown, the utility model provides an implementation of a liquid packaging machine head, including an electric control box 6 integrated on the same frame 7 and a storage tank 1, a liquid separation component 2, a metering pump group 3 and a filling valve group 4 connected in sequence through pipelines, the electric control box 6 at least controls the connection of the metering pump group 3; the liquid in the storage tank 1 is divided into a plurality of output branches through the liquid separation component 2, which respectively correspond to the metering pumps 31 entering the metering pump group 3, and the output end of each metering pump 31 is connected to a filling valve 41 of the filling valve group 4 for filling.

[0042] The components for performing subpackaging and filling are integrated on the machine head, which is an independent module, so that the machine head and the machine body are two relatively independent modules. The machine head is installed on the machine body through its own frame, which is convenient for separate transportation, installation and maintenance.

[0043] The present application provides an embodiment of the rack 7, such as Figure 1 As shown:

[0044] The frame 7 includes a support plate 71, a top mounting plate 72, a bottom support plate 73 and a side plate 74; wherein the side plates 74 are provided with two groups, which are vertically and symmetrically arranged, and the side plates 74 are L-shaped structures, wherein the long sides are horizontally arranged and the short sides are vertically arranged; the support plate 71 is vertically arranged between the short sides of the two side plates 74; the top mounting plate 72 is arranged between the tops of the short sides of the two side plates 74; and the bottom support plates 73 are provided with two groups, which are respectively vertically arranged between the ends of the long sides of the two side plates 74.

[0045] The metering pump group 3, which is often disassembled and cleaned, is set on the top mounting plate 72 to facilitate regular cleaning and maintenance; the follower mechanism 5 is set on the support plate 71, and the filling valve group 4 is located outside the entire frame, connected to the metering pump group 3 through a hose, and the follower mechanism 5 drives the filling valve group 4 to move up and down; the liquid separation component 2 and the storage tank 1 are set between the two side plates 74 through mounting parts; the electric control box 5 is vertically set at the end of the long sides of the two side plates 74, and is located above the bottom support plate 73.

[0046] The various components of the machine head are modularly designed and are individually mounted on the frame 7, which is convenient for disassembly and assembly, and each component can be maintained individually.

[0047] Transparent maintenance holes are designed on the side panels 74 on both sides of the frame 7 to facilitate observation of the motion state of the follower mechanism 5 so as to perform maintenance in a timely manner.

[0048] In this embodiment,

[0049] The material storage tank 1 is used to store materials that need to be filled.

[0050] The liquid separation component 2 is used to separate the material in the storage tank 1 to the metering pump 31 of the metering pump group 3.

[0051] The metering pump 31 includes at least one metering pump 31 ; the filling valve group 4 includes at least one filling valve 41 ; each metering pump 31 corresponds to one filling valve 41 or multiple filling valves 41 , and the metering pump 31 and the filling valve 41 are connected via a hose 32 .

[0052] Among them, Figure 6 As shown, the filling valve 41 is composed of a joint 42, a valve body 43, and a nozzle 44 arranged from top to bottom. The joint 42 is used to be connected to the hose 32, and the nozzle 44 is used to fill the material into the container.

[0053] In this embodiment, the valve body 43 and the nozzle 44 of the filling valve 41 are threadedly connected, so that the nozzle 44 can be quickly replaced.

[0054] In order to avoid splashing and wall sticking during the filling process, in the present embodiment, each filling valve 41 is connected to a follower mechanism 5, which can drive each filling valve 41 to perform reciprocating motion synchronously or independently to keep the liquid outlet end of the filling valve 41 always close to the liquid surface in the packaging container.

[0055] The follower mechanism 5 includes at least one lifting mechanism; the lifting mechanism drives the filling valve 41 to rise and fall, and is used to control the distance between the nozzle 44 of the filling valve 41 and the liquid level in the container being filled, so that the nozzle 44 of the filling valve 41 moves upward as the liquid level in the container being filled rises;

[0056] In this embodiment, the specific numbers of the metering pump 31, the filling valve 41 and the lifting mechanism are not specifically limited.

[0057] Among them, one metering pump 31 can control one filling valve 41. On the premise of ensuring the filling effect, one metering pump 31 can also control multiple filling valves 41.

[0058] Preferably, one metering pump 31 can control one filling valve 41 to ensure filling accuracy.

[0059] One set of lifting mechanisms can control one filling valve 41 , and one set of lifting mechanisms can also control multiple filling valves 41 .

[0060] In order to ensure the synchronization of the lifting and lowering of the filling valves 41 , preferably, one set of lifting mechanisms controls all the filling valves 41 , that is, one set of lifting mechanisms controls the filling valve group 4 .

[0061] The present application provides an embodiment of the lifting mechanism, such as Figure 3 As shown:

[0062] The lifting mechanism includes a ball screw pair 51, a driving device 52 and a connecting piece 53; the ball screw pair is vertically arranged on the support plate 71; the driving device 52 is also arranged on the support plate 71, and the driving device 52 is used to drive the screw of the ball screw pair 51 to rotate; the connecting piece 53 is used to connect the ball nut of the ball screw pair and the filling valve 41, so that the filling valve 41 and the ball nut move synchronously.

[0063] Further, in order to enable a group of ball screw pairs 51 to drive the entire filling valve group 4 to move synchronously, a specific embodiment is provided, such as Figure 3 As shown:

[0064] All the filling valves 41 of the filling valve group 4 are arranged at the same height on the same mounting plate 54; the connecting member 53 is used to connect the ball nut of the ball screw pair and the mounting plate 54, so that the filling valve group 4 and the ball nut move synchronously.

[0065] In order to further ensure the stability of the connecting member 53 during the lifting process, a specific embodiment is provided, such as Figure 3 As shown:

[0066] The connecting member 53 includes a connecting plate 531 and connecting rods 532 symmetrically arranged at both ends of the connecting plate 531. The connecting rods 532 and the connecting plate 531 are vertically arranged. The connecting plate 531 and the ball nut are connected. A through groove 56 is provided on the support plate 71 along the moving trajectory of the connecting rod 532. The two connecting rods 532 pass through the through groove 56 and are connected to the mounting plate 54, so that the mounting plate 54 is arranged parallel to the connecting plate 531, so that a rectangle is formed between the mounting plate 54, the connecting plate 531 and the connecting rods 532, thereby ensuring the stability of the whole formed by the connecting member 53 and the mounting plate 54 during the movement.

[0067] The support plate 71 is provided with slide rails 57 on both sides of the ball screw pair 51 , and the connecting plate 531 is provided with a slider 58 that can slide along the slide rail 57 on one side facing the slide rail 57 , which plays a guiding and supporting role for the movement of the connecting plate 531 .

[0068] Furthermore, in this embodiment, the driving device 52 includes a driving motor 521, and a synchronous wheel 522 is provided at the output end of the driving motor 521. A synchronous wheel 522 is also provided at the end of the lead screw on the same side. The two synchronous wheels are engaged with a synchronous belt 523 to achieve synchronous rotation; the electric control box 6 controls the start and stop, forward rotation and reverse rotation of the driving motor 521 according to the electrical signal emitted by the sensor 55.

[0069] The driving motor 521 adopts a servo motor, which is convenient for controlling the rotation speed of the motor.

[0070] During the filling process, the follower mechanism first drives the filling valve down to the lower station, so that the filling valve is located inside the packaging container and close to the bottom of the packaging container, and the metering pump is turned on to start discharging the liquid. During the discharging process, as the liquid level rises, the follower mechanism drives the filling valve to rise steadily to the upper station, and the main machine completes the horizontal seal and pulls down on the packaging container to complete the filling of this batch of packaging containers; then the next batch of packaging containers are transported to the bottom of the filling valve, and the above actions are repeated.

[0071] The movement rhythm of the filling valve (rising speed, descending speed and the transition between the rising state and the descending state) can be set in advance in the control system according to the filling speed (the rising speed of the material level in the container during the filling process).

[0072] The filling speed is determined by the discharge speed of the filling valve and the size of the container; the speed of the servo motor determines the moving speed of the filling valve. Therefore, before filling, the speed of the servo motor (the speed changes during the process) and when the servo motor changes its forward and reverse rotation should be debugged so that the movement rhythm of the filling valve matches the entire filling process. A certain error value can be allowed between the two.

[0073] The filling valve has two processes of descending and ascending during the filling process. In order to limit its stroke and avoid collision with other parts during the movement, a specific embodiment is provided, such as Figure 3 As shown:

[0074] Two groups of sensors 55 are provided on the frame 7 along the length direction of the screw rod; the sensor 55 is used to send an electrical signal to the electric control box 6 when the ball nut or the connector 53 moves to the sensing area of ​​the sensor 55. The electric control box 6 stops the servo motor of the drive device 52 according to the received electrical signal, thereby playing a protective role and preventing the filling valve and the components of the follow-up mechanism from colliding with other components during the movement of the filling valve.

[0075] Among them, the position of the sensor 55 located at the bottom is set as: when the object sensed by the sensor 55 moves to the sensing area of ​​the sensor 55, the filling valve group 4 is located at the lowest position within its safety travel range; the position of the sensor 55 located at the top is set as: when the object sensed by the sensor 55 moves to the sensing area of ​​the sensor 55, the filling valve group 4 is located at the highest position within its safety travel range.

[0076] In this embodiment, the sensing object of the sensor 55 is preferably the connecting rod 532 in the connecting member 53 .

[0077] The present application also provides an embodiment of the liquid separation component 2, such as Figure 4 As shown:

[0078] The liquid separation component 2 includes a liquid separation main pipe 21 and multiple liquid separation branch pipes 22, one end of each of the multiple liquid separation branch pipes 22 is connected to the liquid separation main pipe 21; the other end of the liquid separation branch pipe 22 is connected to the metering pump 31; one end of the liquid separation main pipe 21 is sealed, and the other end is connected to the storage tank 1 through a curved pipe.

[0079] Both ends of the liquid dispensing main pipe 21 are fixed on the side plates 74 via fixing seats.

[0080] The present application also provides an embodiment of the storage tank 1, such as Figure 5 As shown:

[0081] The storage tank 1 includes a tank body 11, on which a liquid inlet 12 and a liquid outlet 13 are provided; the liquid inlet 12 is connected to an external material storage device through a pipeline, on which a solenoid valve 14 is provided, and the liquid outlet 13 is connected to a liquid distribution main pipe 21; a liquid level gauge 15 is provided inside the tank body 11; the liquid level gauge 15 is used to obtain the real-time liquid level height of the material in the tank body 11 and send an electrical signal to the electric control box 6, and the electric control box 6 controls the opening and closing of the solenoid valve 14 according to the received electrical signal.

[0082] Before the equipment is filled, the liquid level meter 15 detects the liquid level height of the material in the tank body 11. When the liquid level is lower than the specified liquid level, an electrical signal is sent to the electrical control box 6. The electrical control box 6 controls the opening of the solenoid valve 14 according to the received electrical signal, and the material enters the storage tank 1 through the feed port. During the loading process, the liquid level meter 15 detects the liquid level height in the tank body 11 in real time. When the specified liquid level is reached, an electrical signal is sent to the electrical control box 6. The electrical control box 6 controls the closing of the solenoid valve 14 according to the received electrical signal.

[0083] During the filling process of the equipment, the liquid level meter 15 detects the liquid level height of the material in the tank body 11 in real time and replenishes the material into the tank body 11 in real time.

[0084] In this embodiment, the tank body 11 is a relatively sealed cavity to avoid pollution from the external environment; a respirator 16 is provided on the tank body 11 so that the inside and outside of the tank body 11 are connected to solve the problem of pressure imbalance during liquid filling and discharge.

[0085] The respirator 16 is a sanitary respirator 16 specially used for the tank.

[0086] In this embodiment, a cleaning port 17 is further opened on the side wall of the tank body 11 .

[0087] There are two cleaning ports 17, which can be used to select manual cleaning or CIP cleaning according to different user needs, so as to facilitate the cleaning and maintenance of the tank body 11.

[0088] The present application also provides a specific implementation of a liquid packaging machine, including a head and a body, wherein the head is detachably mounted on the body, and the electric control box of the head and the main control system of the body are connected by a main line, so that the head and the body are two relatively independent modules, which are convenient for separate transportation, installation and maintenance.

[0089] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A liquid packaging machine head, characterized in that: It comprises an electric control box (6) integrated on the same frame (7) and a material storage tank (1), a liquid separation component (2), a metering pump group (3) and a filling valve group (4) which are connected in sequence through pipelines, wherein the electric control box (6) at least controls the connection of the metering pump group (3); The liquid in the storage tank (1) is divided into a plurality of output branches by the liquid separation component (2) and respectively enters each metering pump (31) of the metering pump group (3), and the output end of each metering pump (31) is connected to a filling valve (41) of the filling valve group (4) for filling.

2. The liquid packaging machine head according to claim 1, characterized in that: The metering pump group (3) is openly arranged at the top of the frame (7), the storage tank (1) is arranged on one side of the frame (7), the filling valve group (4) is arranged on the other side of the frame (7), and the electric control box (6) is arranged on the frame (7) on one side of the storage tank (1).

3. The liquid packaging machine head according to claim 1 or 2, characterized in that: Each of the filling valves (41) is connected to a follower mechanism (5), and the follower mechanism (5) can drive each of the filling valves (41) to perform reciprocating motion synchronously or independently, so as to keep the liquid outlet end of the filling valve (41) always close to the liquid surface in the packaging container.

4. The liquid packaging machine head according to claim 3, characterized in that: The follower mechanism (5) comprises a ball screw pair (51), a driving device (52) and a connecting member (53); The ball screw pair (51) is vertically arranged on the frame (7); The driving device (52) is used to drive the screw of the ball screw pair (51) to rotate; All the filling valves (41) of the filling valve group (4) are arranged at the same height on the same mounting plate (54); The connecting member (53) is used to connect the ball nut of the ball screw pair and the mounting plate (54), so that the filling valve group (4) and the ball nut move synchronously; The metering pump (31) and the filling valve (41) are connected via a hose (32).

5. The head of the liquid packaging machine according to claim 4, characterized in that: Two groups of sensors (55) are provided on the frame (7) along the length direction of the screw rod; The sensor (55) is used to send an electrical signal to the electric control box (6) when the ball nut or the connecting piece (53) moves to the sensing area of ​​the sensor (55), and the electric control box (6) stops driving the screw of the ball screw pair (51) to continue rotating according to the received electrical signal; This is to limit the highest position and the lowest position of the filling valve group (4) during its vertical movement.

6. The head of the liquid packaging machine according to claim 4, characterized in that: The driving device (52) comprises a driving motor (521), and the driving motor (521) drives the screw rod to rotate; The electric control box (6) controls the start and stop, and the forward and reverse rotation of the drive motor (521).

7. The liquid packaging machine head according to claim 1, characterized in that: The liquid separation component (2) comprises a liquid separation main pipe (21) and a plurality of liquid separation branch pipes (22), and one end of each of the plurality of liquid separation branch pipes (22) is respectively connected to the liquid separation main pipe (21); The other ends of the plurality of liquid separation branch pipes (22) are respectively connected to the metering pumps (31); One end of the liquid separation main pipe (21) is sealed, and the other end is connected to the material storage tank (1).

8. The head of the liquid packaging machine according to claim 7, characterized in that: The material storage tank (1) comprises a tank body (11), and the tank body (11) is provided with a liquid inlet (12) and a liquid outlet (13); The liquid inlet (12) is connected to an external material storage device through a pipeline, a solenoid valve (14) is provided on the pipeline, and the liquid outlet (13) is connected to the liquid distribution main pipe (21); A liquid level meter (15) is provided inside the tank body (11); The liquid level meter (15) is used to obtain the real-time liquid level height of the material in the tank body (11) and send an electrical signal to the electrical control box (6). The electrical control box (6) controls the opening or closing of the solenoid valve (14) according to the received electrical signal.

9. The liquid packaging machine head according to claim 8, characterized in that: The tank body (11) is a relatively sealed cavity; The tank body (11) is provided with a respirator (16), so that the inside and outside of the tank body (11) are connected.

10. A liquid packaging machine, characterized in that: The machine head and machine body are provided as described in any one of claims 1 to 9, wherein the machine head is detachably mounted on the machine body, and an electric control box of the machine head and a main control system of the machine body are connected via a main line.

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